Prayer Circles

First of all I have a fear of sleeping at night, for the simple fact that there is time when when laying in my bed and I'm not asleep yet but, it will feel like something is one top of me and I can not breath or scream for somebody to help me, this has been going on for years and I'm really tired of this, sometime I will open my eyes when this is happening and I will see a dark figure on and I just would really like prayer for this, that Jesus and his angels would watch over my bed, and would just give me some understanding of why this keeps happening to me, please just pray for me.